Understanding the effect of trace elements supplementation on volatile fatty acids production from proteins
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Título: | Understanding the effect of trace elements supplementation on volatile fatty acids production from proteins |
Autor/a: | Bevilacqua, Riccardo Regueira López, Alberte Mauricio Iglesias, Miguel Lema Rodicio, Juan Manuel Carballa Arcos, Marta |
Centro/Departamento: | Universidade de Santiago de Compostela. Departamento de Enxeñaría Química |
Palabras chave: | Amino acid degradation | Biorefinery | Carboxylate platform | Micronutrients | Mixed-culture fermentation | |
Data: | 2021 |
Editor: | Elsevier |
Cita bibliográfica: | Journal of Environmental Chemical Engineering 9 (2021) 105934. https://doi.org/10.1016/j.jece.2021.105934 |
Resumo: | This investigation studies the impact of trace elements supplementation on protein anaerobic conversion into volatile fatty acids (VFAs). Two continuous reactors were operated with two model substrates, casein and gelatin, at acid (pH 5) and neutral (pH 7) conditions, with the addition of macro and micronutrients. Micronutrients increased the acidification degree of both proteins from 40% to 50% to more than 60% only at pH 7, which was consistent with a greater amino acid consumption at neutral conditions. Furthermore, trace elements modified the process selectivity, promoting valeric acids production and other variations dependant on protein composition. Isomerisation and chain elongation processes were identified as a consequence of the observed deviations between amino acid consumption and VFA production. Overall, this study demonstrated that the supplementation of micronutrients can be useful to enhance and steer the anaerobic fermentation of protein-rich streams |
Versión do editor: | https://doi.org/10.1016/j.jece.2021.105934 |
URI: | http://hdl.handle.net/10347/27647 |
DOI: | 10.1016/j.jece.2021.105934 |
E-ISSN: | 2213-3437 |
Dereitos: | © 2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) |
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